Factory ammo or hand loading? I went PRC but I'm still working up a load/the barrel is still speeding up. Big selling point for me was the cheaper components over the SS (brass, does, gauges, barrels, etc) and I wasn't after the absolute most speed. The 3100+ listed for 140 class bullets in the manuals will be more than enough for my use and with a few companies making brass I can spend as much or as little as I'd like.
Hornady has their load data for the cartridge on their website. Should come up with an internet search.